Apple Power Macintosh 4400 - Manual (Page 60)

IMPORTANT Virtual memory may keep some applications from running at
their best speed. Don’t turn on virtual memory unless you need to keep
several applications open at once. You should turn it off when you no longer
need it. (You can turn virtual memory on or off by using the Memory control
panel in the Control Panels folder in the Apple [K] menu.)
Note: If you turn on both virtual memory and a RAM disk in the Memory
control panel, don’t set both of them at or near their maximum values. A
RAM disk uses RAM as if it were hard disk space. Using both can result in
unpredictable or reduced performance by your computer.
Protecting the information on a disk
When you have a valuable paper document like a birth certificate, you
probably make an extra copy of it for safekeeping. Similarly, you should make
copies of the documents you create on your computer. The extra copy is
called a backup, and the process of making the copy is called backing up.
Once you have a backup, you’re protected from accidentally losing the
information on your hard disk. In the unlikely event that something happens
to your hard disk, you can easily get the information back.
Making backup copies of your documents
Follow these tips for making backup copies of the documents on your
computer:
m Regularly make copies of the documents you create.
m You can back up files stored on your hard disk by copying them to
floppy disks.
m You can back up an entire floppy disk by copying it to another floppy disk
of the same capacity or larger, or by copying it to a hard disk.
m If a file is too large to fit onto a single floppy disk, you need to use a
commercial backup application to copy the file onto multiple floppy disks.
m You can use a commercial backup application to copy new and changed
files from a hard disk to another hard disk, to a tape drive, or to a series of
floppy disks.
m If your computer is on a network, you may be able to back up files by
copying them to a shared disk on the network.
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